146 total maps. There are 3 maps for each of the 47 Congressional townships that make up Vernon Parish. Each Township has a Patent Map, Patent Index, Road Map, and a Map we call an Historical Map, which includes Waterways, Watercourses & Railroads. The Road and Historical Maps also include the City-centers and cemeteries that can be found at NationalAtlas.gov. There is also a Surname/Patent Index and a Surname/Township Index to help you dive into the right area of the Parish. Included Appendices identify multi-Patentee buying groups and also list the numerous Aliquot (section) parts you might find. This book is constructed to last with a plastic spiral binding, acid-free paper, and a tough, laminated cover. What is the relevant time-frame (years) for this book? Whenever the land was first sold or transferred to the public by the United States government. But the truth is that most counties took decades to settle and it is not unusual to find counties where the first patent might date in the 1820s and the last one may be in the 1920s. The important thing to remember is that these are FIRST landowners---not for just a single date---but each parcel is labeled using the first landowner. You can answer this question with total accuracy by searching the patents in the county you are interested in at www.glorecords.blm.gov. This is, after all, our source for the patents that we map